The sharpest images of stars that can be formed by a single, large, ground-based, visible-light telescope are of the order of what angular size? A) about 10^-3 arcsecond B) about 1° C) about 1 arcminute D) about 0.2 arcsecond

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Quizplus · Accepted Answer

The sharpest images of stars formed by a large, ground-based, visible-light telescope are limited by the Earth's atmosphere to about 0.2 arcsecond in angular size. This limitation is due to atmospheric turbulence, which distorts the light coming from stars and other celestial objects.

The Sharpest Images of Stars That Can Be Formed by a Single